The average daily maximum temperature during this 31-day period stood at 23.1° Celsius — more than two degrees below normal and the lowest in at least a decade (see chart). The mean daily minimum temperature during this period was 14.1° Celsius, making it the second lowest in a decade. The 30-year average minimum temperature for Calcutta is 15.5° in December and 14.3° in January. The corresponding average maximum temperatures are 26.7°and 25.5°. Between December 15, 2018, and January 15, 2019, the mean daily minimum temperature was lower at 13.8°, but the mean daily maximum was much higher at 25.6°.

Source: The Telegraph January 15, 2026 23:43 UTC